Cascode GaN dv/dt control via Gate Modulation
APEC 2015 Seminar S17
74
Vgs
Vsw
Vgs
Vsw
2A Turn off
2A Turn on
3.3V/ns
3.7V/ns
50ns/div
100ns/div
Dv/dt control possible by modulating cascode gate-drive current
This places HEMT in linear region increasing switching times and losses
Unknown if this affects long-term reliability – further study needed